Across
- 4. Nodules of lymphoid tissue found in small intestine.
- 5. Soft, beloved organ where T-cells mature.
- 7. Major lymphocyte found circulating in the blood.
- 8. Immune response that is fast but nonspecific.
- 11. Bone marrow type that produces blood cells.
- 12. Immune cells that generate antibodies.
- 13. Cells involved in specific defenses.
- 15. Stem cell line that produces remainder of blood cells.
- 16. Term used to describe old, worn-out RBCs.
- 17. Area of spleen that contains lymphocytes.
- 19. Hormone produced by the thymus gland.
- 20. Immune response that is slower but highly specific.
Down
- 1. Defenses that include skin and mucous membranes.
- 2. Stem cell line that produces B-cells and T-cells.
- 3. Process of making new blood cells.
- 6. Immune cells that destroy virally-infected cells and cancer cells.
- 9. Both T-cells and B-cells respond to ___, but their response differs.
- 10. Largest lymphoid organ that filters blood.
- 14. Sets of lymphoid tissue around oral cavity.
- 18. Cells that secrete antibodies.